title: Nanocomposite based flexible ultrasensitive resistive gas sensor for chemical reactions studies.
abstract: Room temperature operation, low detection limit and fast response time are highly desirable for a wide range of gas sensing applications. However, the available gas sensors suffer mainly from high temperature operation or external stimulation for response/recovery. Here, we report an ultrasensitive-flexible-silver-nanoparticle based nanocomposite resistive sensor for ammonia detection and established the sensing mechanism. We show that the nanocomposite can detect ammonia as low as 500 parts-per-trillion at room temperature in a minute time. Furthermore, the evolution of ammonia from different chemical reactions has been demonstrated using the nanocomposite sensor as an example. Our results demonstrate the proof-of-concept for the new detector to be used in several applications including homeland security, environmental pollution and leak detection in research laboratories and many others.
authors.affiliation: Materials Research Centre, Indian Institute of Science, Bangalore 560012, India.
authors.forename: Sadanand
authors.initials: S
authors.lastname: Pandey
authors.forename: Gopal K
authors.initials: GK
authors.lastname: Goswami
authors.forename: Karuna K
authors.initials: KK
authors.lastname: Nanda